Why do Rival 12-speed road chains have links that are flat on one side? The plates of the 12-speed Flattop chains are thinner. To maintain strength, material is added to the top of the chain plate making it the strongest and longest lasting chain we’ve ever made. Related articles Will a Rival 12-speed Flattop road chain work on a SRAM Eagle drivetrain? What surface treatment/coating is SRAM using on Rival 12-speed Flattop chain? Can a Rival Flattop PowerLock be installed and uninstalled repeatedly, or does it need to be replaced with a new PowerLock after being removed one time? What chainring size options do you offer for Rival eTap AXS? What chain is compatible with the SRAM RED 36T Max rear derailleur? Can I use an Eagle 12-speed chain with this derailleur?